著者

中山 正人 福田 健一 荒木 拓人 恩田 和夫

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.125, no.2, pp.213-220, 2005 (Released:2005-05-01)

参考文献数

16

被引用文献数

3 2

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The secondary batteries for the electric vehicle (EV) generate much heat during rapid charge and discharge cycles, when the EV starts quickly consuming the battery power and stops suddenly recovering the inertia energy. The generated heat increases significantly the cell temperature and causes possibly bad influences on the battery performance and the safely requirement. So we have studied the thermal behavior of nickel/metal hydride (Ni/MH) battery during rapid charge and discharge cycles, applying our previous battery thermal model, which have been confirmed to agree with the experimental results at smaller charge current than the rated current. The heat sources by the entropy change, the hydrogen occlusion and the side reaction have been referred to the published data, and the overpotential resistance and the current efficiency, the ratio of main reaction current to charge current, have been measured experimentally through the rapid charge and discharge characteristics with constant current. By using these data our thermal model for Ni/MH battery has estimated its temperature increase, which agrees well with the measured temperature rise, with the root mean square error of 1.5°C and 2.1°C for charge and discharge cycles, respectively.

著者

影目 樹亮 大島 孝昌 中山 正人 伊藤 衡平 恩田 和夫

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B (ISSN:03875016)

巻号頁・発行日

vol.70, no.689, pp.223-228, 2004-01-25

参考文献数

10

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The nickel/metal hydride battery (Ni/MH) has been developed as a power source for the hybrid electric vehicle (HEV) and the pure electric vehicle (PEV). But the large battery with heavy duty cycle by more rapid charge and discharge than today's is desirable for the diffusion of HEV and PEV. Therefore the thermal behavior of Ni/MH battery must be understood precisely for the battery size enlargement and its performance improvement. In this report the thermal behavior of small Ni/MH battery during rapid charge and discharge cycle has been studied numerically and experimentally by considering the entropy changes by electrochemical reactions, the endothermic reaction by hydrogen occlusion to MH, the exothermic reaction by side reaction, the heat generation by overpotential and the heat transfer to the ambient air. The calculated cell temperature agrees well with the measured under both the charge and discharge cycles below the rated current, but the calculated is larger than the measured above the rated current.

著者

中山 正人 福田 健一 荒木 拓人 恩田 和夫

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.125, no.2, pp.213-220, 2005-02-01

参考文献数

11

被引用文献数

2 2

---

The secondary batteries for the electric vehicle (EV) generate much heat during rapid charge and discharge cycles, when the EV starts quickly consuming the battery power and stops suddenly recovering the inertia energy. The generated heat increases significantly the cell temperature and causes possibly bad influences on the battery performance and the safely requirement. So we have studied the thermal behavior of nickel/metal hydride (Ni/MH) battery during rapid charge and discharge cycles, applying our previous battery thermal model, which have been confirmed to agree with the experimental results at smaller charge current than the rated current. The heat sources by the entropy change, the hydrogen occlusion and the side reaction have been referred to the published data, and the overpotential resistance and the current efficiency, the ratio of main reaction current to charge current, have been measured experimentally through the rapid charge and discharge characteristics with constant current. By using these data our thermal model for Ni/MH battery has estimated its temperature increase, which agrees well with the measured temperature rise, with the root mean square error of 1.5°C and 2.1°C for charge and discharge cycles, respectively.